Question

(7a+3) + (-a-15)= -16

Answer 1

I ttoally forgot what these are called..Are the expressions or equations XD

Answer 2

First Add like terms

Answer 3

6a - 12 = -16
Then you have to get "a" alone so you add 12 to both sides of the equal sign.
After you do that you get... 6a = -4
Then you divide both sides by 6 to get "a" alone which leaves you with...
\[A = \frac{ -4 }{ 6 }\] Then you simplify and you will get your answer.